Home – Home – Jornals – Chemistry for Sustainable Development 2005 number 3

Using sweet and sulphurous oils of West Siberia as an example, the regularities in chromatographic isolation and separation of sulphur compounds (SC) with the use of tin tetrachloride have been studied for the first time. It has been demonstrated that the efficiency of SC separation depends on the content of total sulphur in oil. The high extent of decontamination of the studied oils from SC is achieved: 72-95 % with respect to total sulphur and 68-95 % with respect to sulphide sulphur. Most part of SC is isolated with benzene chromatographic fraction irrespective of sulphur content of oil, of Pr/Ph ratio, and of geological confines of a reservoir. Sulphur compounds of the studied oils are presented by thiophenes and sulphides. Oils with 0.22-0.68 mass % of the total sulphur are dominated by alkyl-substituted thiacycloalkanes among sulphides and by alkyl-substituted dibenzothiophenes among thiophenic compounds. Oils with 0.94-1.14 mass % of the total sulphur are dominated by alkylbenzothiacycloalkanes and alkylnaphthenodibenzothiophenes.